Know Your Environment. Protect Your Health.

Xylenes (total)

Harris County Water Control and Improvement District 89

Xylenes are solvents used in industrial and consumer products, such as cleaning agents and paint thinners. Xylenes cause nervous system damage and may harm developing fetuses.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
20200.325 ppb41ND - 1.30 ppb
2021ND20ND
2022ND20ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1,800 ppb

The EWG Health Guideline of 1,800 ppb for xylenes was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the brain and nervous system.

EPA Maximum Contaminant
Level (MCL): 10,000 ppb

The legal limit for xylenes, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s. This limit may not fully protect against harm to the brain and nervous system due to xylene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-29AE11016ND
2018-08-06AE35876ND
2019-02-19AE54852ND
2019-02-19AE54888ND
2020-01-22AE94706ND
2020-04-22AF076741.30 ppb
2020-07-29AF21142ND
2020-10-22AF31675ND
2021-02-23AF43937ND
2021-04-22AF51136ND
2022-01-31AF82569ND
2022-01-31AF82573ND
2023-03-07Q2309824001ND
2023-04-27AG38464ND